Fire Hydrant Pump System (also known as fire pumps, hydrant boosters, fire water pumps) is high pressure water pumps designed to increase the firefighting capacity of a building by boosting the pressure in the hydrant service when mains is not enough, or when tank fed.

Fire Alarm System essentially operates on the same principle. If a detector detects smoke or heat or someone operates a break glass unit (manual break point), then alarm sounders operate to warn others in the building that there may be a fire and to evacuate.